水污染控制工程02 水体污染与自净（Water pollution control engineering 02 water pollution and self purification）.docVIP

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水污染控制工程02 水体污染与自净（Water pollution control engineering 02 water pollution and self purification）.doc

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水污染控制工程02 水体污染与自净（Water pollution control engineering 02 water pollution and self purification）

水污染控制工程02 水体污染与自净（Water pollution control engineering 02 water pollution and self purification） Water pollution control engineering 02 water pollution of.Txt life, face the fate of destruction. I do not love eolian dust, it seems to be mistaken by the front edge!! I only shed tears for the one I love most. I will learn to give up on you, because I love you too much. I won. I can give up the whole world. The second chapter, water pollution and self purification Section 1 water pollution The second section is water self purification Third water-saving pollution control methods Concept of water pollution The chemicals in the water in the bottom of the content and the water environmental capacity of pollutant exceeded in number, resulting in physical, chemical and microbiological properties of water change, make water natural ecosystem and water damage function. In general, the key to the ecological balance of water bodies is DO in water. Section 1 water pollution Factors affecting oxygen balance in water (1) entry of organic pollution; (2) substances that affect atmospheric re oxygenation; (3) thermal pollution. Other factors affecting the ecological balance of water bodies and causing water pollution: (1) toxic substances; (2) acid-base pollution; (3) suspended pollution; (4) N.P nutritional pollution. Harm of water pollution 1. fecal sewage pollution 2. pollution of urban sewage Because the pollutants that cause anoxic water are the excrement of organism and the residue of organism, this kind of pollution is called organic pollution, or organic pollution. 3. industrial waste water pollution 4., the seriousness of water pollution hazards Any pollution to ground water can have serious consequences. Second, the self purification of water body The self purification of rivers refers to the natural lowering of pollutants in the river water when it flows downstream. Physical purification Dilution of sewage in water A pollutant moving along the direction of a stream due to t